I deleted all the Account information from my directories and restarted.

I can load carbonite on any other toon that I have. On any server... I have a total of 14 toons on 3 servers.

The one having the issue is Amona on Cairne. She is a lvl 83, Night Elf Hunter, with Cold Weather Flying.

I hope this helps to determine the issue, because I've done all I can do here. I don't know if there is someway I can contact wow about optimizing my character in case there is something wrong there or what.